/* Yuqoriga qaytish tugmasi qismi — ilova va veb-sayt (landing) uchun umumiy */
.scroll-top-btn {
    position: fixed;
    right: 20px;
    bottom: 92px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(var(--overlay-rgb), 0.14);
    background: linear-gradient(145deg, rgba(var(--overlay-rgb), 0.1), rgba(var(--overlay-rgb), 0.03));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--fg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.28);
    z-index: 250;
    opacity: 0;
    transform: translateY(14px) scale(.85);
    pointer-events: none;
    transition: opacity .25s ease, transform .25s cubic-bezier(.2, .8, .2, 1), border-color .2s ease, background .2s ease;
}

.scroll-top-btn.state--visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.scroll-top-btn:hover {
    border-color: rgba(var(--accent-rgb), 0.4);
    background: linear-gradient(145deg, rgba(var(--accent-rgb), 0.18), rgba(var(--overlay-rgb), 0.04));
    transform: translateY(-3px) scale(1.04);
}

.scroll-top-btn:active {
    transform: translateY(0) scale(0.94);
}

.scroll-top-btn__icon {
    width: 20px;
    height: 20px;
}

@media (max-width: 900px) {
    .scroll-top-btn {
        right: 16px;
        /* MUHIM: bu tugma endi #chatFab (bottom:78-128px) DAN HAM,
           Tinglash bo'limidagi mini-pleyer (bottom:136-196px atrofida,
           to'liq kenglikdagi panel) DAN HAM yuqorida, aniq bo'shliq
           bilan joylashadi — ikkalasi bilan ham hech qachon
           to'qnashmaydi. */
        bottom: calc(204px + env(safe-area-inset-bottom, 0px));
        width: 44px;
        height: 44px;
    }

    .scroll-top-btn__icon {
        width: 18px;
        height: 18px;
    }
}